---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-62-680dc6aac850> in <module>()
----> 1 corona_df[['Lat', 'Long_', 'Confirmed', 'Combined_Key']].apply(lambda x: circle_maker(x), axis = 1)

C:\ProgramData\Anaconda3\lib\site-packages\pandas\core\frame.py in apply(self, func, axis, broadcast, raw, reduce, result_type, args, **kwds)
   6002                          args=args,
   6003                          kwds=kwds)
-> 6004         return op.get_result()
   6005 
   6006     def applymap(self, func):

C:\ProgramData\Anaconda3\lib\site-packages\pandas\core\apply.py in get_result(self)
    140             return self.apply_raw()
    141 
--> 142         return self.apply_standard()
    143 
    144     def apply_empty_result(self):

C:\ProgramData\Anaconda3\lib\site-packages\pandas\core\apply.py in apply_standard(self)
    246 
    247         # compute the result using the series generator
--> 248         self.apply_series_generator()
    249 
    250         # wrap results

C:\ProgramData\Anaconda3\lib\site-packages\pandas\core\apply.py in apply_series_generator(self)
    275             try:
    276                 for i, v in enumerate(series_gen):
--> 277                     results[i] = self.f(v)
    278                     keys.append(v.name)
    279             except Exception as e:

<ipython-input-62-680dc6aac850> in <lambda>(x)
----> 1 corona_df[['Lat', 'Long_', 'Confirmed', 'Combined_Key']].apply(lambda x: circle_maker(x), axis = 1)

<ipython-input-61-47134ed06616> in circle_maker(x)
      2     folium.Circle(location = [x[0], x[1]],
      3                  radius = float(x[2])*10,
----> 4                  popup = '{}\nConfirmed Cases: {}'.format(x[3], x[2])).add_to(m)

C:\ProgramData\Anaconda3\lib\site-packages\folium\vector_layers.py in __init__(self, location, radius, popup, tooltip, **kwargs)
    265 
    266     def __init__(self, location, radius, popup=None, tooltip=None, **kwargs):
--> 267         super(Circle, self).__init__(location, popup=popup, tooltip=tooltip)
    268         self._name = 'circle'
    269         self.options = path_options(line=False, radius=radius, **kwargs)

C:\ProgramData\Anaconda3\lib\site-packages\folium\map.py in __init__(self, location, popup, tooltip, icon, draggable, **kwargs)
    275         super(Marker, self).__init__()
    276         self._name = 'Marker'
--> 277         self.location = validate_location(location)
    278         self.options = parse_options(
    279             draggable=draggable or None,

C:\ProgramData\Anaconda3\lib\site-packages\folium\utilities.py in validate_location(location)
     63                              .format(coord, type(coord)))
     64         if math.isnan(float(coord)):
---> 65             raise ValueError('Location values cannot contain NaNs.')
     66     return [float(x) for x in coords]
     67 

ValueError: ('Location values cannot contain NaNs.', 'occurred at index 867')